Neutral gas maps as derived from the NaD absorption line profiles. First row: optical continuum image (represented in logarithmic scale and in units of 10^-13 erg s^-1 cm^-2) obtained from the mean of the line-free continuum nearby the doublet in a 100 Å  restframe-wavelength range. Second row: the equivalent width map for the λ5890 line, velocity field, and velocity dispersion map for the main component. Third row: the same as the second row but for the secondary component. EWs maps are in Å, while the kinematic maps are in km s^-1. The cross marks the galaxy nucleus (Sect. 3.3).